2024-03-29T09:18:50Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/68912022-10-19T06:43:26Zcom_10259.4_104com_10259_2604col_10259_6848
Vega-Zamanillo, Ángel
Juli-Gándara, Luis
Calzada Pérez, Miguel A.
Teijón-López-Zuazo, Evelio
2022-09-16T10:43:13Z
2022-09-16T10:43:13Z
2021-07
978-84-18465-12-3
http://hdl.handle.net/10259/6891
10.36443/10259/6891
The main objective of road conservation is to maintain the characteristics of the platform
elements to ensure that vehicle mobility is carried out comfortably and safely. The
orographic conditions of Spain, with a large length of high mountain roads and others at
sea level; and winter weather events, with low temperatures, wind, water, ice, snow,…,
which cause deposits of particles, filler, soils, small metals, or sea salt on the pavement
surface, can be dangerous in the circulation of vehicles.
One of the traditional methods for maintaining wheel-pavement adhesion is to apply flux
products, mainly salt (sodium chloride, NaCl) and calcium chloride (Cl2Ca), solidly or
humidified (salt brine). This chemical fluxes have the property of preventing the formation
of ice as antifreeze, or facilitating their melting if it has already formed.
This research studies the influence of salt in the surface layer of pavement made of hot mix
asphalt with conventional binder. The effect of the salt is analyzed under three different
conditions: immerse the specimens in salt water; add salt as aggregate in the manufacture
of the mix; and submerging the natural aggregate in water with several amounts of salt, dry
it and then manufactured the mixture with it. The mechanical parameters of the mixture
have been analyzed in the laboratory: density, air voids, adhesion, indirect tensile strength
and plastic deformation. To do this, Marshall test, Water Sensitivity Test (ITSR) and
Wheel Tracking Test have been performed.
The properties of hot mix asphalt do not decrease significantly when it is manufactured of
salt added as aggregate, neither when it is submerged in salt water. The bituminous mixture
offers negative results when it is manufactured with natural aggregate submerged in water
with salt previously, because the adhesion between the aggregate and the binder is low.
eng
info:eu-repo/semantics/openAccess
Infraestructuras
Infrastructures
Study on the conservation of bituminous mixes in high mountain roads and coastal zones
info:eu-repo/semantics/conferenceObject